Announced by the USPS on October 24, 2022.

Among nature’s most beautiful wonders, waterfalls come in all shapes and sizes, from serene cascades to mighty cataracts. The Postal Service celebrates the variety and beauty of American waterfalls with 12 new stamps. Each stamp features a photograph with the name of the waterfall and state in which it is located. Art director Greg Breeding designed the stamps and pane with existing photographs.

New information will appear below the line, with the most recent at the top.

Updated (catching up) September 7^th:
How to Order the First-Day-of-Issue Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at store.usps.com/store/home. They must affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

FDOI – Waterfall Stamps
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900

After applying the first-day-of-issue postmark, the Postal Service will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by October 13, 2023.

Technical Specifications:

Issue: Waterfalls Stamps
Item Number: 580900
Denomination & Type of Issue: First-Class Mail Forever
Format: Pane of 12 (12 designs)
Series: N/A
Issue Date & City: June 13, 2023, Yellowstone National Park, WY 82190
Art Director: Greg Breeding, Charlottesville, VA
Designer: Greg Breeding, Charlottesville, VA
Existing Photo: Tim Fitzharris
Existing Photo: Kevin Schafer
Existing Photo: John Cancalosi
Existing Photo: Joe Miller
Existing Photos: David B. Vernon
Existing Photo: Sandra Woods
Existing Photo: Nicole Nugent
Existing Photo: Quang-Tuan Luong
Existing Photo: Kenneth Keifer
Modeler: Joe Sheeran
Manufacturing Process: Offset
Printer: Ashton Potter (USA) Ltd (APU)
Press Type: Muller A76
Stamps per Pane: 12
Print Quantity: 34,992,000 stamps
Paper Type: Nonphosphored Type III, Block Tagged
Adhesive Type: Pressure-sensitive
Colors: Cyan, Magenta, Yellow, Black
Stamp Orientation: Vertical
Image Area (w x h): 1.225 x 1.56 in / 31.115 x 39.624 mm
Overall Size (w x h): 1.255 x 1.59 in / 31.877 x 40.386 mm
Full Pane Size (w x h): 7.8132 x 6.6257 in / 198.4552 x 168.2927 mm
Press Sheets Size (w x h): 24.1896 x 20.6271 in / 614.4158 x 523.9283 mm
Plate Size: 108 stamps per revolution
Plate Number: “P” followed by four (4) single digits in two corners
Marginal Markings:
Front: Header: Waterfalls • Plate number in bottom 2 corners
Back: ©2022 USPS • USPS logo • Two barcodes (580900) • Plate position diagram (9) • Promotional text

Updated August 7^th:
Here are the Scott catalogue numbers for this issue: 5800 Waterfalls pane of 12
a. Deer Creek Falls, AZ
b. Nevada Fall, CA
c. Harrison Wright Falls, PA
d. Lower Falls of the Yellowstone River, WY
e. Waimoku Falls, HI
f. Stewart Falls, UT
g. Niagara Falls, NY
h. Dark Hollow Falls, VA
i. Grotto Falls, TN
j. Sunbeam Falls, WA
k. LaSalle Canyon Waterfall, IL
l. Upper Falls, NC
m. As No. 5800, imperforate
n. As No. 5800a, imperforate
o. As No. 5800b, imperforate
p. As No. 5800c, imperforate
q. As No. 5800d, imperforate
r. As No. 5800e, imperforate
s. As No. 5800f, imperforate
t. As No. 5800g, imperforate
u. As No. 5800h, imperforate
v. As No. 5800i, imperforate
w. As No. 5800j, imperforate
x. As No. 5800k, imperforate
y. As No. 5800l, imperforate

Updated May 5^th:
[first day ceremony details] [click on any of the pictures for larger versions]
Postal Service To Issue Waterfall Stamps

What: The U.S. Postal Service is celebrating the variety and beauty of American waterfalls with 12 new stamps. Each stamp features a photograph with the name of the waterfall and state in which it is located beneath it.

The first-day-of-issue event for the Waterfalls Forever stamps is free and open to all visitors of Yellowstone National Park. News of the stamp is being shared with the hashtag #WaterfallsStamps.

Who: Mike Elston, U.S. Postal Service Board of Governors secretary, will serve as the dedicating official

Cameron “Cam” Sholly, Yellowstone National Park superintendent

Kenneth Keifer, photographer of the Lower Falls of the Yellowstone River stamp

When: Tuesday, June 13, 2023, at 11 a.m. MT

Where: Canyon Visitors Education Center
Yellowstone National Park, WY

RSVP: Attendees are encouraged to RSVP at: usps.com/waterfalls.

Background: Among nature’s most beautiful wonders, waterfalls come in all shapes and sizes, from serene cascades to mighty cataracts. The 12 waterfalls featured on the stamps represent many different types — and each is unique.

Waterfall IDs:First row: Deer Creek Falls, Grand Canyon National Park, AZ, photo by Sandra Woods; Nevada Fall, Yosemite National Park, CA, photo by Quang-Tuan Luong; Harrison Wright Falls, Ricketts Glen State Park, PA; and Lower Falls of the Yellowstone River, Yellowstone National Park, WY, photos by Kenneth Keifer.Second row: Waimoku Falls, Haleakalā National Park, HI, photo by Quang-Tuan Luong; Stewart Falls, Mount Timpanogos Wilderness, UT, photo by Nicole Nugent; Niagara Falls, Niagara Falls State Park, NY, photo by John Cancalosi; and Dark Hollow Falls, Shenandoah National Park, VA, photo by Quang-Tuan Luong.
Third row: Grotto Falls, Great Smoky Mountains National Park, TN, photo by Joe Miller; Sunbeam Falls, Mount Rainier National Park, WA, photo by Kevin Schafer; LaSalle Canyon Waterfall, Starved Rock State Park, Oglesby, IL, photo by David B. Vernon; and Upper Falls, Blue Ridge Parkway, NC, photo by Tim Fitzharris.

Framing the stamps is selvage that again features David B. Vernon’s LaSalle Canyon image.

Art director Greg Breeding designed the stamps and pane with existing photographs.

Updated March 14^th:
Here are the first-day postmarks for this issue:The Digital Color Postmark measures 2.90″ x 1.49″ The pictorial postmark measures 2.32″ x 1.49″

Updated March 14^th:
The issue date is June 13th in Yellowstone National Park, WY. The fourth stamp (far right) on the top row is the Lower Falls of the Yellowstone River.